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US 2018/0019328 A1Published application
Nanoscale electronic spin filter
AssigneeYeda Research and Development Co. Ltd.
InventorOren TAL
Life of this patent
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Abstract
The present invention is in the field of spintronics, and relates to a highly efficient spin filter device, such as a spin-polarizer or a spin valve, and a method for fabrication thereof.
Claims25
A spin filter device comprising two metal electrodes ended with low-coordinated surfaces and at least one atomic scale junction between said surfaces;
- said atomic scale junction comprising:
- at least one oxygen atom;
- or
- at least one atomic chain formed by atoms of said metal and oxygen atoms interconnected between said metal atoms;
- thereby enhancing a spin-filtering effect by selective p-d orbital hybridization between the p orbitals of the oxygen and the d orbitals of the metal, promoting spin-polarized currents via frontier d orbitals of the metal and suppressing poorly spin polarized-currents via frontier s orbitals of the metal.
2 more elements
A method of fabrication of a spin filter device, the method comprising:
- providing a wire (or a segment thereof) made of a ferromagnetic or antiferromagnetic metal;
- controllably elongating a region of said wire until identifying at least one predetermined elongation condition of the wire;
- exposing at least said region of the wire to oxygen environment, thereby forming in said region an atomic scale junction comprising:
- at least one oxygen atom;
- or
- at least one atomic chain formed by the metal and oxygen atoms interconnected between the metal atoms;
- resulting in a selective p-d orbital hybridization between the p orbitals of the oxygen and the d orbitals of the metal.
4 more elements
A method of fabrication of the spin filter device, said method comprising:
- controllably depositing a single oxygen atom or metal and oxygen atoms on a first substrate to form an oxygen atom attached to said substrate or to form at least one metal-oxygen atomic chain(s) attached to said substrate.
Dependencies are inferred from the claim text.